Reading an Equity Curve: What the Line Is Telling You

A track record is mostly numbers. One part of it is a picture. The equity curve (the plotted line of an account’s value over time) carries more information per square inch than any table on the page, and most people glance at it for two seconds and move on. This is a primer in reading the line itself: what its shape says, what its dips say, and where it stops being able to tell you anything at all.

What an equity curve actually plots

An equity curve is a chart of account value against time. The horizontal axis is dates. The vertical axis is the money in the account, either in currency or as a percentage gain from the starting point. Each point on the line is what the account was worth on that day.

Two things are worth knowing before you read one. First, find out whether the line is drawn from balance or from equity. Most track-record platforms plot both (Myfxbook shows balance and equity together on its growth and balance charts, and a MetaTrader 5 trading report draws the two as separate curves), but the headline line is usually the balance-derived one. Balance counts only closed trades. Equity includes the floating profit and loss on positions still open. A curve drawn from balance can look serene while a large losing position sits open underneath it, unrecorded until the day it is finally closed. A curve drawn from equity shows that pressure as it happens. Where both are drawn, read the gap between them, not just the top line: a wide gap is itself information.

Second, check whether the vertical axis is linear or logarithmic. Retail track-record platforms are almost always linear, and on a linear axis a move from 100 to 200 occupies the same vertical space as a move from 1,000 to 1,100, even though the first is a 100 percent gain and the second is 10 percent (both figures illustrative). Long compounding histories on a linear axis therefore look like a flat stretch followed by a rocket. That steepening is an artefact of the axis, not necessarily a change in the strategy. Check the axis label before you read drama into a curve’s late acceleration.

Smooth versus jagged, and why smooth is worth more

Two curves can end at exactly the same point and describe completely different experiences. One climbs in small, regular steps. The other lurches: a vertical spike, a cliff, a long crawl, another spike. Same destination. Different journeys, and different odds that you actually stay invested long enough to arrive.

Smoothness is a proxy for consistency. A line that rises in similar increments suggests the result is coming from many repetitions of one process rather than a handful of outsized events. Jaggedness suggests the opposite: that the outcome depends heavily on a small number of trades. Cover the last third of a jagged curve with your hand and ask whether you would have predicted where it goes next. If the answer is no, the strategy’s future is more uncertain than its total return implies.

Two curves that end in the same place did not take the same risk to get there.

Look specifically at whether the big up-moves and the big down-moves are the same size. A curve with small, frequent gains and rare enormous drops is a different animal from one with symmetrical steps in both directions. Neither is disqualifying, but the first one’s return profile depends on those rare events staying rare, and the line will not tell you whether they will. For why this shape question matters more than the headline number, see Why Drawdown, Not Return, Defines a Strategy.

Reading a drawdown off the line

You do not need the statistics table to measure a decline. It is visible in the geometry, and reading it directly is a useful skill because it forces you to look at the whole shape rather than one summary figure.

Find a local peak, a high point the line does not exceed again for a while. Follow the line down to its lowest point before it turns back up. That vertical distance is the depth of the decline. Then follow it right, to the moment it first reclaims the old peak. That horizontal distance is the duration.

• Depth tells you how much of the account was temporarily gone. Using illustrative figures: a curve that peaks at 12,000, falls to 9,600, and later returns to 12,000 has declined by 2,400, which is 20 percent of the peak.
• Duration tells you how long you would have been sitting in it. Depth is a number; duration is an experience. A shallow decline lasting eighteen months tests patience differently from a sharp one resolved in three weeks.
• Recovery slope tells you how the climb back happened. In that same illustrative example, going from 9,600 back to 12,000 requires a gain of 2,400 on a base of 9,600: 25 percent, not the 20 percent that was lost. The asymmetry is arithmetic, and it steepens as declines get deeper: The Recovery Math walks through why a 50 percent loss needs a 100 percent gain.
• Count the dips. One deep valley in a long history reads differently from six shallow ones. Frequency is part of the shape.

Flat spells, new highs, and what the shape is telling you

A rising line is easy to read. A flat one is the part most people skip, and it is often the most informative.

Flat means the strategy stopped making progress without losing much. Sometimes that is a market that offers the strategy nothing: a trend system in a range, a volatility system in dead conditions. That is a strategy behaving as designed and waiting. Sometimes flat means something changed and the edge is gone. The curve alone cannot distinguish between the two. What it can do is tell you how long the flat spells run, so you know what a normal quiet period looks like before you sit through one.

New highs deserve attention too. A curve that makes fresh peaks regularly across its whole span is behaving differently from one that made all its highs early and has been rangebound since. Ask when the most recent new high occurred. If the answer is far to the left of the chart’s right edge, the record’s headline return is describing something the strategy has not repeated in a long time.

What a curve cannot show you

Visual literacy has limits, and knowing them is the point of learning it.

A curve cannot tell you whether the account was funded once or topped up repeatedly. Deposits and withdrawals can bend a line in ways that have nothing to do with trading skill. It cannot tell you whether the data is verified or self-reported. It cannot show you leverage, position sizing, or whether the account traded one instrument or thirty. It cannot show trades that were held open indefinitely rather than closed at a loss, if the chart plots balance. And it cannot show survivorship: the accounts that ended badly are usually not the ones being shown to you.

The line is where you start, not where you finish. Once the shape has told you what kind of behaviour you are looking at, go and check it against the numbers and the verification status. How to Read a Myfxbook Track Record covers the fields that sit underneath the picture.

This article is educational and is not investment advice, a recommendation, or an offer. Trading foreign exchange and CFDs carries a substantial risk of loss, including the loss of your entire investment. All figures above are illustrative examples used only to demonstrate how to read a chart; they are not results, projections, or typical outcomes. Past performance is not a guarantee of future results. Consider your circumstances and seek independent professional advice where appropriate.